rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10202 ticks this GP) idle=2d74/1/0x4000000000000000 softirq=21506/21507 fqs=5218
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   958085          0            0
rcu: 	cputime:    32810      19669           49   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=15521 q=3288 ncpus=2)
CPU: 0 UID: 0 PID: 7250 Comm: syz.2.435 Not tainted 6.17.0-rc1-syzkaller-00022-g07866544e410 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:kfree_skbmem+0x137/0x1c0
Code: e8 de 20 65 f8 48 c7 c0 d8 6d e6 8d 48 c1 e8 03 42 80 3c 38 00 74 0c 48 c7 c7 d8 6d e6 8d e8 10 93 c8 f8 48 8b 3d e1 e2 8b 04 <48> 89 de 5b 41 5e 41 5f 5d e9 0b c2 bd f8 bf 01 00 00 00 89 ee e8
RSP: 0018:ffffc90000007938 EFLAGS: 00000246
RAX: 1ffffffff1bccdbb RBX: ffff888021c7b400 RCX: ffff888109d50000
RDX: 0000000000000100 RSI: 0000000000000001 RDI: ffff888100ab4a00
RBP: 0000000000000001 R08: ffff888021c7b5e3 R09: 1ffff1100438f6bc
R10: dffffc0000000000 R11: ffffed100438f6bd R12: ffff888021c7b400
R13: ffff8880307dc100 R14: ffff888021c7b5e0 R15: dffffc0000000000
FS:  00007f09e6f226c0(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000001e5f6000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000f0602
Call Trace:
 <IRQ>
 tcp_write_queue_purge+0x143/0x300
 tcp_done_with_error+0x43/0xd0
 tcp_retransmit_timer+0x1d16/0x3370
 tcp_write_timer+0x162/0x2e0
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:finish_task_switch+0x26b/0x950
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 cf b7 ea 09 e8 5a 3f 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc900079b7718 EFLAGS: 00000286
RAX: 222e4518820dec00 RBX: 0000000000000000 RCX: 222e4518820dec00
RDX: 0000000000000006 RSI: ffffffff8d9b6dc3 RDI: ffffffff8be33300
RBP: ffffc900079b7770 R08: ffffffff8fa37e37 R09: 1ffffffff1f46fc6
R10: dffffc0000000000 R11: fffffbfff1f46fc7 R12: ffff888109d50000
R13: dffffc0000000000 R14: ffff888020c20000 R15: ffff88804b03ab58
 __schedule+0x17a0/0x4cc0
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 smp_call_function_single+0x470/0x590
 perf_install_in_context+0x593/0x8f0
 __se_sys_perf_event_open+0x193a/0x1d70
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f09e618ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f09e6f22038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f09e63b5fa0 RCX: 00007f09e618ebe9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000440
RBP: 00007f09e6211e19 R08: 0000000000000003 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f09e63b6038 R14: 00007f09e63b5fa0 R15: 00007ffc44c6cfe8
 </TASK>
